Websites

Polar Tutorial

District 16
time-distance-pace calculator

http://www.topendsports.com/testing/tests/20mshuttle.htm

http://www.marathonguide.com/fitnesscalcs/HeartRate2calc.cfm This one uses your resting heart rate as a factor.


http://www.marathonguide.com/fitnesscalcs/HeartRate1calc.cfm Basic Heart Rate Calculator